Piston



Patented July l, 1922.

2 SHEETS-TSHEET l.

Z1-wen for? C. P. HOUSENIN.

PISTON.`

APPLICATION FYLED AUG-16. 192i.

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C. P. HOUSEIVIAN.

FISTON.

APPLICATION FILED Auemi. I92I.

. ,42 3 ,425. Patented July 18,1922.

2 SHEETS-SHEET 2.

agi/IMM PATENT Price.

CHRISTIAN PAUL HOUSEMAN, 0F YORK, PENNSYLVANIA.

PISTON.

To all whom 'it may concern.'

Be it known that I, CHRISTIAN l). HOUSE- MAN, a citizen of the United States, residing at York, in the county of/York and State of Pennsylvania, have invented new and useful Improvements in Pistons, of which-the following is a specicatio-n.

This invention relates to improvements in pistons for internalcombustion engines and the like, the principal object of the invention being to provide means for adjusting th'e diameter of the piston so that it can be expanded to compensatel forvwear of the cylinder walls. l

Another object of the invention is to provide means for holding the wrist pin in position and to keep-'its ends Jfrom contacting with the cylinder walls and thus damaging the same.

This invention also consists in certain other features of construction and in the combination and .arrangement of the several parts, to be hereinafter fully described, illustrated in the accompanying drawings and specically pointed out in the appended claim.

In describing my invention in detail, reference will be had to the :accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and ih which:-

Figure 1 is an elevation of a piston constructed in accordance with my invention.

Figure 2 is a longitudinal sectional view.

Figure 3 is a view of the piston with the sleeve and collars removed.

Figures 4 and 5 are detail views.

In these views 1 indicates the piston which is provided with the usual grooves 2 for receiving the ring 3. This piston is connected with the crank shaft by the usual connecting rod which is connected with the piston by the wrist pin 4 which engages a hole 5 in the piston. These parts are of the well known construction and form no pcrtion of my invention.

It is well understood by those skilled in the art that after the motor has been used for some time the cylinder walls wear so that the piston fits loosely in the cylinder which causes loss of compression and permits the oil from the crank case to enter the combustion chamber. This wear also causes specification of Letters Patent. -Patented July 18, 1922,

Application filed August 16, 1921.

Serial No. 492,711.

the piston slap.- In order to correct this it is necessary to rebore the cylinders and use oversized pistons. This is a very expensive operation and it is the object of my inventiongto provide means whereby the piston can be expanded to compensate for this wear.

In carrying out my invention I form the lower part of. the piston with tapered walls, as sho-wn at 6, and I Aplace screw threads 7 on the piston at the beginning and ending of saidtapered part. These screw threaded portions are to receive the screw threaded collars 8 andthe tapered part is to receive the split sleeve 9 which has a tapered bore to engage the tapered walls and which is held in place by having its beveled ends engaging the beveled ends of the collars, as shown at 10. The collars are of less Width than the screw threaded portions so that they can be adjusted to move the sleeve longitudinallyon the same. The split part of the sleeve is shown at 11 and by forcingl the sleeve upwardly it will be seen that it will.

be expanded due to the tapered walls of the sleeve and piston. The collars are provided with holes 12 for adjusting the collars and to carry off surplus oil. The collars are of less diameter than the sleeve so that they will not engage the cylinder walls when the sleeve has expanded to engage said walls.

The sleeve ,-is provided with a hole 13 which is of greater diameter than the hole 5 for the wrist pin so that said wrist pin can be put in place without interference on the part of the sleeve. After the pin has been put in place the sleeve is turned to cover the hole 5' and the ends of the wrist pin so that there is no danger of ,the ends of the pin coming in contact with the cylinder walls. After the. sleeve is. adjusted so that it will make a snug fit with the cylinder the collars are tightened to lock it in place.

Thus it willbe lseen that the piston can i.

bore engaging said tapered part `and means for adjusting the sleeve longitudinally and circumferentially on the piston, such means l0 comprising a pair of collars' for engaging the ends of the sleeve.

In testimony whereof I aiiix my signature.

CHRISTIAN PAULI HOUSEMAN. 

